--TEST--
Fix UMR in array_user_key_compare (MOPB24)
--SKIPIF--
<?php
if (true) die("skip AOT does not support undefined variables");
?>

--FILE--
<?php
function array_compare(&$key1, &$key2)
{
    $GLOBALS['a'] =& $key2;
    unset($key2);
    return 1;
}
function main()
{
    $arr = array("A" => 1, "B" => 1);
    uksort($arr, "array_compare");
    var_dump($a);
}
?>
--EXPECTF--
Warning: array_compare(): Argument #1 ($key1) must be passed by reference, value given in %s on line %d

Warning: array_compare(): Argument #2 ($key2) must be passed by reference, value given in %s on line %d
string(1) "B"